2-word synonyms for <component> and <transition> tags

[iliubinskii]

Problem:

1. Single-word tag names contradict to VueJS style guidlines: https://vuejs.org/style-guide/rules-essential.html
2. Single-word tag names contradict HTML specs: https://html.spec.whatwg.org/multipage/custom-elements.html#valid-custom-element-name
3. Unknown single-word tags are highlighted as invalid inside vscode editor:
   

Solution:
Add two word synonyms, while leaving original <component> and <transition> tags as is without any changes.